86W87 - ESAB 86W87 Replacement O-Ring Buna-N 70A

Stop Leaks and Keep Welding with the ESAB 86W87

There is nothing more frustrating for a welder than a leaky torch or a machine that just won't hold pressure. Often, the culprit is a tiny, worn-out piece of rubber. The ESAB 86W87 O-Ring is the exact replacement part you need to fix those annoying leaks and get back to laying beads. Designed specifically for ESAB equipment, this O-ring takes the guesswork out of finding a seal that fits. No more digging through a box of random O-rings hoping to find one that is "close enough"—this part is sized perfectly with a .801-inch ID and .070-inch thickness to snap right into place and do the job.

Why does the material matter? This O-ring is made from Buna-N, also known as Nitrile rubber. This is the go-to material for welding environments because it stands up tough against oils, grease, and water. If you have ever had an O-ring swell up and get mushy, it was probably the wrong material. The ESAB 86W87 is built to resist that kind of degradation. It features a 70A durometer, which means it has the standard hardness required for a solid seal that won't pinch or tear easily during installation. Whether you are swapping out a liner, fixing a gas connection, or doing routine maintenance on your feeder, having a fresh seal makes all the difference.

Gas coverage is king in welding. A compromised O-ring can suck in atmospheric air, leading to porosity and bad welds, or it can waste expensive shielding gas. By replacing your old, dried-out, or cracked O-rings with a fresh ESAB 86W87, you ensure that your shielding gas goes exactly where it is supposed to—the weld pool. It is a cheap insurance policy against bad welds and rework.

We recommend keeping a few of these in your toolbox or maintenance locker. O-rings are the first thing to go during regular tear-downs and cleaning. Don't let a ten-cent failure cause a hundred-dollar downtime. Inspect your seals regularly for cracks or flat spots, and when in doubt, swap it out. With the ESAB 86W87, you are using a genuine part that restores your machine's performance and reliability instantly.